Rockets guard Bob Sun on Thursday underwent what the team deemed to be successful arthroscopic knee surgery, though no estimates were made about when Sura could resume workouts.

Sura, 32, said Wednesday the condition in his right knee could be career- threatening, describing Thursday’s procedure to remove particles as the key to whether he could play again. But the Rockets were optimistic the surgery, his second since the end of the season, would correct problems.

“There were just a lot of particles left and there was a flap of cartilage in there and some little bony pieces that they took out,” Rockets trainer Keith Jones said. “They got everything cleaned up, and it’s just a matter of letting those bony surfaces heal. We just cleaned it out.

“Dr. (Walter) Lowe said he would wait until he sees him again (late next week) to put a timetable on everything. We just told Bobby it was going to be a slower rehab than we did this summer. We’re just going to take it slow and easy and when he’s ready, he’s ready.”